html,body{
    height: 100%;
    width: 100%;
}
.container-fluid{
    width: 100%;
    height: 40px;
}
.container-fluid .top{
    height: 100%;
    border: 1px solid gray;
}
.container-fluid .top>div{
    height: 100%;
    line-height: 40px;
    text-align: center;
    border-right: 1px solid gray;
}
.container-fluid .top .first{
    position: relative;
}
.container-fluid .top .first a{
    font-size: 12px;
    text-decoration: none;
    color: gray;
}
.container-fluid .top .first img{
    display: none;
    position: absolute;
    left: 45px;
    top: 40px;
    z-index: 3;
}
.container-fluid .top .first:hover img{
    display:block;
}
/*第二格*/
.container-fluid .top .second a{
    color: gray;
    font-size: 12px;
}
.container-fluid .top .second a span{
    font-size: 12px;
    color: gray;
}
/*第三格*/
.container-fluid .top .third{
    font-size: 12px;

}
.container-fluid .top .third a{
    margin-left: 5px;
    color: gray;
}
/*第四格*/
.container-fluid .top .fourth{

}
.container-fluid .top .fourth a{
 font-size: 12px;
    color: gray;
    margin-left: 5px;
}





